I have recently been trying out different settings to speed up my computer, but for some reason my log on screen has changed size. Basically my computer is set at 1024 by 768 pixels, but my log on screen looks about 800 by 600 pixels, so the bottom and the right of the screen is not displaying anything. When I have logged on the computer goes to normal size. I've posted a picture which i made on paint to give you an idea of what it looks like.
Any help would be appreciated thanks.